Forecast Details for Merna, IL

Recent Locations: Hanover, PA Toppenish, WA Merna, IL

Current Alerts for Merna, IL: Wind Advisory

Today: Showers and thunderstorms likely before 2pm, then showers and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. High near 72. Windy, with a south wind 20 to 25 mph increasing to 28 to 33 mph in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 3am. Partly cloudy, with a low around 52. Breezy, with a south southwest wind 23 to 28 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 41 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Friday: Showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 75. Light and variable wind becoming south southeast 8 to 13 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday Night: Showers and possibly a thunderstorm. Low around 57. South southeast wind 14 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Saturday: A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 61. Breezy, with a west wind 16 to 23 mph, with gusts as high as 30 mph.

Saturday Night: Partly cloudy, with a low around 35. Breezy, with a west wind 17 to 20 mph, with gusts as high as 28 mph.

Sunday: Mostly sunny, with a high near 52. West northwest wind around 18 mph, with gusts as high as 25 mph.

Sunday Night: Mostly clear, with a low around 35.

Monday: Sunny, with a high near 57.

Monday Night: Partly cloudy, with a low around 31.

Tuesday: Mostly sunny, with a high near 53.

Tuesday Night: Mostly cloudy, with a low around 34.

Wednesday: Partly sunny, with a high near 66. Breezy.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Cumulonimbus Clouds?

Home - Education - Cloud Types - Cumulonimbus Clouds

Cumulonimbus Clouds Next Topic: Cumulus Clouds

The final form taken by a growing cumulus cloud is the cumulonimbus cloud, which is very tall and dense. The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although most commonly they stop growing at an altitude of 6 km.

Even small cumulonimbus clouds appear very large in comparison to other cloud types. They can signal the approach of stormy weather, such as thunderstorms or blizzards.

Next Topic: Cumulus Clouds

Weather Topic: What is Drizzle?

Home - Education - Precipitation - Drizzle

Drizzle Next Topic: Evaporation

Drizzle is precipitation in the form of water droplets which are smaller than raindrops.

Drizzle is characterized by fine, gently falling droplets and typically does not impact human habitation in a negative way. The exception to this is freezing drizzle, a condition where drizzle freezes immediately upon reaching earth's surface. Freezing drizzle is still less dangerous than freezing rain, but can potentially result in hazardous road conditions.

Next Topic: Evaporation